Vacuum return boiler feed



July 12, 1927.

l.. K. Assi-IER VACUUM RETURN BOlLER FEED Filed April 12, 1920gllllllllvlllllll.

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415V n into v`a return pipe() leading vfrom theinjec-j P-atnedfJulr192175:

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- .fr inventionl The single figurefotsuchkv drawing is aA somewhat;diagrammatic view showing the Yessentialelements of my invention.

m berofradiators 12 and thevdis'charge sides Y of such` radiators areconnected'through a returnV pipe 13 to a vacuum tankV 14, from which thecondensed Wateris returned to the g boiler 10 by-a pipe 15in Which isasuitableA 15 pump 16 Aformoving the Water through such pipe. lThe pipe15 opens into the'vacuum tank 14 at a point above thebot-toin thereof,to avoid taking'in any sediment which the is a check valve'17betWeen'the pump 16:and the boiler 10 for preventingbackflow'from ftheboiler lto the pump.V The vacuum tank VY14 may befprovidedV vvith asuitabledrain 'l pipe 18; and in the pipe. 13V there'is preferably asteam-strainer l19y to remove any sediment from the yWater and steamreturningl The Ainjector 2,0v is supplied'with AWaterY from Y. 'andreturns Water to an auxiliary 'tankf'23 provided with an 'atmospherevent 24, -vvhichy v auxiliary tank is partly lled withk Water toanintermediate level indicatedv by' a Water" gage 25. The Waterl Vfromthe Water tank'23 .is supplied to theinjector 20 by a pump 26,

27 to such Watertank, preferably at a point j kabovethe'bottom ofthelat-ter, and -the dis-y charge of which leads by a pipef28 to the Watery jet'29 of the vinjector 20'. Such'water jety discharges the Waterthrough the injectorv20 tor to the Water` tank 23. l.Thewater tank 23also has a suitable drainpipe 31,

. The two pumps 16 and 26 are conveniently driven in common by anelectric motor 82, to Which both'p'umps are directly connected.

The `operation of the motor 32 is controlled in response to the vacuumconditions in the vacuum tank 14, by a .vacuum-responsive Water maycontain; and inv such pipe 15 there the intakeofvvh.ich'is'y connectedbyk a pipeV Application aie'a'apfufig, igzcf: serieu N0.373',177. fr

y'regulator 33, responsive-to .the vacuuni'infthe 'f1.5 Y,

vacuum tank 14yand controlling a switchin vthe supplyyvires34leadingtothemotor32; A u gthegpresent 'invention isnotconcerned'fwith` rthedetail's ottheqregulator.33.

'tank 14, Vand therefore the vacuum in the systhrcugh'ithe pipes 27, and28, the injector 20,v

and the pipe 3()k back to thefwater tank 23.

The action ofthe injector 20dravvs air (and perhaps some 'Water vapor,`but no vliquid Water,) from"the'vacuuin` tank`14 through the i pipe 21and check valve 22, which air `(with anywatervapor) is carried throughthe pipe 30 into theWater't-ank 23 along With-.the Water circulatingfrom and to 'such Water tank.

vThis injector action produces and maintains L in the vacuum' tank 14 avery high vacuum.' The pump 16 takes from the vacuum tank- 14any; Waterabove the level of the intake' end of' thek pipe 15, and deliversA suchWater tothe boiler 10; Which-boilersuppliesthe steam to .the radiator 12byway oftheA sup` i In operation, ,the motor 82 drives the pumps 16 and26-vWhenever the vacuum' in the j, The boiler 10, ofany type, suppliessteam Y y i through a'supply pipe'y 11 to any desired numkplyfpipe11,`the Water of condensation being ,I

taken from the radiator 12 to the vacuum` tank. 14 by the return ,pipe13. The motor 7 32 and the pumpsflrand 26 driventhereby are startedandstopped'vvhen the vacuum in above a predetermined value.v

I claim as my invention: l Y j 1. 'A vvacuum producer,` comprising avacuum tank for connection to av devicein-vvhich the vacuum isftoberproduced, aninjector havinga suction* connection to the vacuum tankto produce and maintain a vacuum inrv the latter, a pump for forcingWater through said injector, and a vacuum-responsive depump. n Y j 2. Avacuuinproducer, comprising a vacuum tank for ,connection to a device inWhich` thevacuum is tobe produced, an injector'kthetank-14-respectivelyfalls below and rises UU n icc

h aving a suction connection to the vacuum Y tank to produce'andmaint-ain a vacuum in the' latter, aV Water tank, a circulating pipesystem fromV said Water tank to the injector ics and back to the Watertank, a pump in said circulating pipe system for circulating Wa terfromy the Water tank therethrough, and

g :i `vacuum-1espensive device responsive to the vacuum in the vacuumfaule for controlling' the operation of the pump in said circulatingpipe system. p

ln an apparatus el' the diei-edel'` cle- .sel-ibeil` the combinationoif'zi tank, ineens for delivering gases and Water of condensation frome healing system le said tank, pump connected Vwith the tank, :inclineens controlled by i'he wafer leiel in said teni; for :idf millingwater from the tank to said pump, whereby Snell surplus Water isdelivered un- Clerfpreesure to a boiler or the like.

,4.1m zin apparatus of the character de scribed', Jthe combination of atank, means for delivering gases and water of condense- 'at the heightof the el connected with n beilei` er the like, :incl` meansfi'olesfablisliine,r enimunieetion between" ,seid pump millthe*1inei'ioigefihetank level therein.

In an apparatus of the character described, the Combination of :L tank,means for delivering gases and waiter ofi condensation from @heatingsystem to `@and tank, e eenti'il'ugal pump, and e pipe establishingcontinuous eonnnuneatien betweeueeid pump` and the interior of said tanketf`the`clesi1efl water level therein.

\ LOUIS` KnSCiillllR.

